Coined in 1859 by H. Kavals, from the same stem as the verb augt, made into a masculine first-declension noun (ending -s), and later popularized by A. Kronvalds, replacing in this sense the word stāds, now more restricted in its use. The alternative form auģis, proposed in the early 1860s by E. Dinsbergs, never became popular and was soon abandoned.[1]

from the same stem as the verb augt, made into an adjective (augs, auga), originally meaning “growing, increasing,” from which “that which continues all the time” and now “all, (the) whole,” used with nouns denoting time. In current standard Latvian, it is found mostly in the instrumental case.[2]